PDF malware analysis — malicious · 77a723f43ed9c01c

MALICIOUS

PDF

71.5 KB Created: 2020-08-31 13:25:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 97debb3151721736b81e71b483cae55b SHA-1: 89c974345a4a801a61e7ebaf642820570e4898d6 SHA-256: 77a723f43ed9c01c5685d4cd1fe373381b1bae21cb6411235b92bd299d1a9baf

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one specifically identified as a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains a reference to the same URL, suggesting an attempt to trick users into visiting a malicious site under the guise of a debt acknowledgement template. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://ttraff.com/wix?keyword=acknowledgement+of+debt+template+free+nz
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_80c09b72ba0a440abe4c978e1794a1c5.pdf
- https://static.usrfiles.com/ugd/77eba6_cf7f042032984f43adb1316347c5ddf2.pdf
- https://static.usrfiles.com/ugd/834936_e03e5d4a1e7f465a8d8a555147e0c123.pdf
- https://static.usrfiles.com/ugd/868401_efc16a0a862a4a9693eea64444b6e02b.pdf
- https://cdn.shopify.com/s/files/1/0432/5444/8286/files/boxadusux.pdf
- https://cdn.shopify.com/s/files/1/0431/7931/1268/files/86557787294.pdf
- https://static.usrfiles.com/ugd/b8c837_ed579ad385854d5c88d434ac03084648.pdf
- https://static.usrfiles.com/ugd/5438e3_7082c4d59367422987990ed0ce139bf5.pdf
- https://cdn.shopify.com/s/files/1/0431/8907/6117/files/nasogaxiw.pdf
- https://cdn.shopify.com/s/files/1/0434/1579/7917/files/88348349136.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d02a.bin` `a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD02A	2828 bytes
`font_01_sfnt_off0000da24.bin` `1c1edb3e6dbf4ecd3b6534e32267b589bb2d4c32687475268e4073e3c3ed2a07`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA24	5632 bytes
`font_02_sfnt_off0000ed64.bin` `6a6709d957579372d93dc35309474ed0c602aeb54780d7f5b4972e0a0fe40abf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED64	10372 bytes

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